The smallest MEASURABLE time unit known today, 1x10^(-24) seconds. Obviously, smaller units of time exist, but proper equipment and methodology for measuring them does not yet exist. Light travels 2.9979x10^(-16) meters in one yoctosecond, not the 3.33km stated above.
Learn to multiply. This isn't even an 'urban' word, so why is it defined here?
A large group of redneck jack offs driving around in a circle for 3 or 4 hours with the sole purpose of determining which one has the biggest dick. For some reason society has deemed this activity a professional sport.
Why NASCAR is even mentioned on SportsCenter is beyond me.